Dental vulcanizer.



PATENTBD APR. 28, 1908. HEBER.

F. W. KORB da W. P.

DENTAL VULGANI'ZBR.

APPLICATION FILED AUG.18.1906.

enTTnn sTATns PATENT crimen.

` i f FREDERICK WM. KORB AND WILLIAM F. HIEBER, OF CLEVELAND, OHIO, ASSIGNORS TO THE UNITED STATES DENTAL MANUFACTURING COMPANY, OF CLEVELAND, OHIO, A CORPO:

lztA'llON OF OHIO.

' DENTAL vULcANIzER.

i Specification of Letters Patent.

Patented April 2s, 190s.

Appinanon med August 1a, 190s. serial No. 3`31,15o.

To all who/7i. 'itfnrlg/ concern:

Be it known that we, FREDERICK WILLIAM Koran and WILLIAM l1". l-l'lnnnn., citizensof the United Stilles, residing et Cleveland, Cuyahoga. county, Ohio, have invented certain new und useful improvements in Dental Vulcnnizers, of which the following is e. specification that will onnble those skilled in. the art to which our invention pertains to make :ind use the suino, reference being had to the accom anying drawing, which forms av part thereo Our invention relates to dental vulcanizers, consisting mainly of :in outer shell or casing provided with suitable heating apparatus, find having a sont adapted to receive and hold s boiler vessel und e. cover for seid vessel with suite-ble means for clam ing said cover upon the month of the vesse g and it consists of :in arrangement of mechanism adapted to carry ont the objcctsbf the invention as will hereinafter be fully described and claimed.

The accompanying drawing shows our invention in construction of detail and general arrangement of the parts now deemed most desirfible by us, but these might be varied Withoutthe exercise of invention, endwithin the skill of e good mechanic, Without dey the boiler id.

parture from the spirit of our invention, as set forth in the claims at the end of this speciicetion. y

TnV the drawing Figure 1 is im elevation 'partly in vertical section. on the line 1, 1 of ig. 3. Fig. 2 is a side elevation of the same as seen from the direction of the 'arrow 2 on Fig. 1.V Fig. 3 is n plan view partly broken away. Fig. 4 is a sectional elevationof the top of the device showing n modification. Fig. .5 is partiel plan view of the same. Fig. 6 is e pers 'ective view ofthe cam for locking Fig. 7 is a. similar view of the lid lever. Fig. S is n. plan view, and Fig. 9 a. sectional elevation of thetop of the boiler vessel.

The outer frame or casing consists of a tapering shell, A having suitable feet af, a suitable aperture c for the entrance of gas or other fuel pipes to c burner (not shown) and a row of apertures, c for the admission of air' to seid burner.v At the top of the shell is e series of apertures c for the escape of the products of combustion,- and a. reinforcing ring B secured to the shell by depending lugs' the clamping device D is mounted.

The ring B is formed with an annular internal sent b4 for the boiler vessel, which coin-v sists of a pressed cup E forced et its top edge This ring which constitutes en annulari enge or/lcdge' at the top of the boiler is deeper than theseet 54 of the casing ring B, and its edge therefore stands above the top of said ring.

The ring B has an internsil groove b5, and a notch b? through the up 4er flange of the groove likethe so. called hjayonet joint. A pin e, projeotirnr from the ring on the oiler, 1s adapted to pass through the notch b, and hein the IGroove b5, of the casing ring, to prevent the lifting of the boiler from its seat until the pin e is brought into line with the notch bs.

Stop pins 67 standin below the cover, as shown in Figs. 1, 2 and 3.l

The lever C lies between lugs f of a cover F, adapted to fit upon the mouth of the boiler, as shown, and is secured therein by a cross pin c fitting loosely in the e ert'ure c2 in the ever. At its mid length t e lever is prefera-bly formed with a. de ressed lug c3, which bears upon the raise center boss of the cover. y The lever is provided with Stud pin c4 upon which is a handle c5 of wood or other .heat non-oonductor. Below this hendle is a projecting lug C', adapted to be engaged by s cern; and at this end the lever is forked below the lng, so that the lug b3 of the casing ring lies between the prongs c of the fork. K

A pin G projects from the lug b3 of the casing ring and supports sninsuleting handle ll and a cleinpin vided with a re a socket in the lu'g bauntil of heavy copperreinby a steel rino" E.v

y l across the groove b5 may be used to lirnlt t e distance the pin e cam D. This pin is v`pro-y j pass 1n or out.

an enlarged shoulder ou the pin bears irinly against the bottom oit' ils socket. Adjacent to this shoulder is another enlargement g2 of the pin upon which the clamping cam D is mounted to turn freely. This cam D Aisprovided With an eccentric groove d on its inner face which opens outwardly through a gap d', the groove and gap being' adapted to receive the lug C on the lever.

The cam is provided with a rigid insulat-v slightly free and loose, and that'some convsiderable movement of the cam shall be i the boiler before the necessary to seat the cover on thel boiler before the clamping pressure is applied. By this arrangement, When opening the boiler, We are enabled to use the powerful cam action to break any adhesive seal between the 'boiler and cover, Which might form While they are clamped, and to liftthe cover away from gap d comes into line with the lug C.

The cover h'as an annular groove on its under side in Which is placed a ring f of asbestos vulcanite, or other suitable packing. In order to compensate for wear in the'cam or lug We provide an adjusting screw F in the central boss of the cover, the lever bearing on this screw as shown, so that raising of the screvr compensates for Wear. Another Way of securing such compensation for wear of the cam is shown by Figs. 4 yand 5, in Which the lscrew just mentioned is dispensed with and the lever mounted on an eccentric pivot f pin I. This pin may be turned to lower the rear end of the lever, and when adjusted is locked in place by set screws i i. The pivotal attachment of the cover to the lever is preferably made loose and free by making the hole c2 in the lever slightly larger than the pivot pin c', which passes through it. This loose connection admits of the cover finding its proper seat on the ltop of the boiler without restraint from the lever.

Under the clamping pressure and heat of the vulcanizing process the packing: between the boiler and its lid frequently causes the lid to .stick with sufficient force to raise the boiler olf its seat, andthen if the .adhesion suddenly breaks the vessel will fall back to its seat and splashits hot contents out through the opening thus left between it and the lid y.which is held suspended from the clamping lever. The locking of' the boiler vessel to its scat onthe 'frame by the beyonet-joint groove and the pin on the boiler, or other 'equivalent means, is regarded as an important feature of this invention.

Having thus described our invention what We claim as new and useful and desire to secure by Letters Patent is: j

i 1. In a dental vulcanizer, the combination of a casing, a boiler vessel ada ted to seat in said casing, a cover adapte /to close the boiler vessel, a lever pivoted on the casing and adapted to bear on the boiler cover, a lug projecting from the free end ofthe lever, a bearing pin projecting from the casing, a cam disk mounted thereon at a right angle to the plane of the lever and having an eccentric groove cut in its inner face adapted to engage thc lug on the lever, with a gap from said groove and means for adjusting the lever to com )ensate for Wear of the cam etc., subst antially as set, forth.

2. In a dental vulcanizer, the combination of a casing, a boiler vessel ada ted to seat in said casing, a cover adapte to close the boiler vessel and having an adjusting screw projecting from its top, a lever pivoted on the casing and adapted to bear upon the screw of the cover, with a cam adapted to engage the free end of the lever and draw it down upon the cover, substantially as s et forth.

3. In a dental vulcanizer, the combination of a casing. having an annular seat near its top and a bayonet-joint groove at the side of the seat, a boiler vessel having a flange adapt ed to rest on said seat, and having a project-A ing pin adapted to enga e the. bayonet-joint groove, a cover adapte to close thefboiler vessel, a lever pivoted to the casing and piv otally connected to the cover, a cam ada ted to engage the free end of the lever and raw it down upon the cover, the cam being so set that it-first draws the cover down into contact with the boiler and then clamps it, and in reverse releases the clamping pressure and then lifts the covers slightlyfrom/ the boiler. substantially as st forth. A

4. In a dental vulcanizer, the combination of a casing having-an annular seat near-its top and a bayonet-joint groove at theside of the seat, a boiler vessel having a Harige adapted to rest in said seat and a projecting pin adapted to engage the bayonet-joint groove and hold the vessel against accidentally lifting,with a cover adapted, to close the boiler vessel and means for clamping said cover upon said vessel, substantieJ ly as set forth.

5. In adental vulcanzer, the combination I of a casing,'a boiler vessel ada ted to seat in the casing, means forlock/in t e boiler vessel againstaccidental lifting om its seat, a

covm adapta-d Q-1) @love 'the boer vega-el, "lever pivote-,d io ifm cursing and also pim comwutmi to 5h91 miler cover, ny @am disk pvntec ou fue @Lf-.ing a1;- a #fight fmge to the plane of the hun? and having au eccentric groove forma-d ou ls imur adapted to engage the end f the 'lever to dos@ und damp the lid on bov'r or te 'eefls'e. and heu init fw {t the id *from its saai. un the folefl, Submnniv as set foi-ih.

1e under side of g 2 race/ss in the from of Vessel abom substimmaly pvotaly cmmectef to the bor the liu@ of ifa@ @Gp of @he casing, as setifth. Y

in' a, dimm fucanzer, the con'fuination of sra-sing; 'a vesse', ay envar for the boiler and s smnpxg leve? pivotal to the cangg and colmctedo the ce'vm 2LH substantlay as desbed, with a cam pivoted ou the msug and adapted to engage the free and mi' th@ @.:ampxg leve?, u screw and Socket the; mgm@ and a pvot an enarged *Piange Q1 Shoulder adapted to 'ft Lto du; Sacmi in tha casing with the Shouldi hard Unimet if@ botzm 0f that portion :et adapted zo jcecfew'e it, substun.- cay as *et forth. J

n testnmny w'1ereof,w have signed our nauw; t@ this specaaton in the pesen of trav() subscrwng Witnesses.

- FREDERCK WVM. KORB.

7 v LLIM E I'lfi R. 

